Subaru Impreza 2003, Service Manual

Page: 1632 / 3610

4AT-100
AUTOMATIC TRANSMISSION
OIL PUMP HOUSING
35.Oil Pump Housing
A: REMOVAL
1) Remove the transmission assembly from the ve-
hicle. <Ref. to 4AT-39, REMOVAL, Automatic
Transmission Assembly.>
2) Extract the torque converter clutch assembly.
<Ref. to 4AT-75, REMOVAL, Torque Converter
Clutch Assembly.>
3) Remove the input shaft.
4) Lift-up lever behind the transmission harness
connector and disconnect it from stay.
5) Disconnect inhibitor switch connector from stay.
6) Remove the oil charger pipe. <Ref. to 4AT-74,
REMOVAL, Oil Charger Pipe.>
7) Remove the oil cooler inlet and outlet pipes.
<Ref. to 4AT-71, REMOVAL, ATF Cooler Pipe and
Hose.>
8) Separation of torque converter clutch case and
transmission case sections <Ref. to 4AT-98, RE-
MOVAL, Torque Converter Clutch Case.>
9) Separate transmission case and extension case
sections. <Ref. to 4AT-77, REMOVAL, Extension
Case.>
10) Remove the reduction drive gear. (MPT model)
<Ref. to 4AT-93, REMOVAL, Reduction Drive
Gear.>
11) Remove the center differential carrier. (VTD
model) <Ref. to 4AT-95, REMOVAL, Center Differ-
ential Carrier.>
12) Remove the reduction driven gear. <Ref. to
4AT-90, REMOVAL, REMOVAL, Reduction Driven
Gear.>
13) Loosen the oil pump housing mounting bolts.
14) Place two wooden blocks on the workbench,
and stand the transmission case with its rear end
facing down.
NOTE:
• Be careful not to scratch the rear mating surface
of the transmission case.
• Note that the parking rod and drive pinion pro-
trude from the mating surface.
15) Remove the oil pump housing and adjusting
thrust washer.
AT-00114
AT-01034
(A) Oil pump housing
AT-00181
(2.17in)
55mm
AT-00182
(A)